Starting digits (Optional) Specify the leading digits of dialed numbers you want the pattern to match. For example, type 425 if you want the pattern to match dialed numbers beginning with 425.

Length Specify the number of digits in the matching pattern and select whether you want the pattern to match this length exactly, match dialed numbers that are at least this length, or match dialed numbers of any length.

Digits to remove (Optional) Specify the number of starting digits to be removed from dialed numbers you want the pattern to match.

Digits to add (Optional) Specify digits to be added to dialed numbers you want the pattern to match.

The values you enter in these fields are reflected in Pattern to match and Translation rule. For example, if you leave Starting digits empty, type 7 into the Length field and select Exactly, and specify 0 in Digits to remove, the resulting regular expression in the Pattern to match is:

^(\d{7})$

In Translation rule, specify a pattern for the format of translated E.164 phone numbers as follows:

A value that represents the number of digits specified in the matching pattern. For example, if the matching pattern is ^(\d{7})$ then $1 in the translation rule represents 7-digit dialed numbers.

(Optional) Type a value into the Digits to add field to specify digits to be prepended to the translated number (for example, +1425).

For example, if Pattern to match contains ^(\d{7})$ as the pattern for dialed numbers and Translation rule contains +1425$1 as the pattern for E.164 phone numbers, the rule normalizes 5550100 to +14255550100.

(Optional) If the normalization rule results in a phone number that is internal to your organization, select Internal extension.

(Optional) Enter a number to test the normalization rule, and then click Go. The test results are displayed under Enter a number to test.